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What's the difference between a standard exhaust and a "Pro" version?

How do I maintain my offroad or Side x Side Exhaust mufflers?

What's the difference between a ZX-14 M10 and M14 exhaust?

Why don't you have my pipe in stock?

Why don't you publish dyno charts?

What is the difference between stainless steel and titanium and which is "better"?

What are the different muffler options and which is "better"?

How do I care for the finish on my Muzzy Exhaust?

Are aftermarket exhaust systems street or offfroad legal?



Q: What's the difference between "Standard" and "PRO" exhaust that's offered on some models?

A: Typically the term "standard" defines a Muzzy exhaust that has been engineered and built to produce the best results on engines with little to no modifications. The Muzzy "Pro" exhaust line has been specifically designed to produce the best results on big bore engines.

Q: How do I maintain my offroad or side x side exhaust mufflers?

A: Muzzys offroad and side x side exhaust mufflers have been designed to require minimal maintenance. When new, the muffler packing will require a break in period. During the initial break in (1 to 2 hours of running), run the machine with the spark screens removed. This will allow any loose material in the muffler packing to exit the exhaust. Follow the procedures outlined in the installation instructions.

The spark arrester screens should be cleaned and inspected regularly.
Muffler packing should also be replaced at regular intervals. (Call Muzzys for a specific repack kit part number). The frequency will depend upon use.


Q: What's the difference between a ZX-14 M10 and M14 exhaust?

A: On the ZX-14 the M10 refers to Muzzys short stainless megaphone style canister. The M14 refers to the most advanced head pipe design available for the ZX-14. In other words, the M14 exhaust system is available with the M10 style canister.


Q: Why don't you have my pipe in stock?

A: We currently manufacture hundreds of different pipes and of course, the only economical way to produce these systems is in "batches". If we and our distributors and dealers have sold out of a particular part number, it may be some time before we can build more of that part number. Please keep in mind that Muzzy exhaust systems are essentially a "hand built" product in the truest sense of the word. Quality takes time.


Q: Why don't you publish dyno charts?

A: This is one of the toughest questions we face. We prefer to speak in terms of percentages of horsepower gain rather than specific numbers. We do this because you the consumer, have come to demand specifics and if that specific target number is not met, you will naturally question the integrity of the individual who gave you the number or the quality of the product. The problem is, we can't give you the horsepower number that YOUR machnine will attain because we don't know what YOUR machine has to begin with. We can (and do) tell you how much of an increase you should expect to see, because this is a fairly constant figure for a given pipe/machine combination. Further, dyno charts are not necessarily correct. The assumption is that they are, but there is no guarantee of that. Dyno numbers can vary wildly, mostly due to the environment that the dyno operates in. Just a few degrees of air temp or exhaust contamination in the dyno cell can substantially effect horsepower. With the widespread use of ram air inlet systems on the popular bikes, small changes in air flow to the engine can make noticeable changes in output numbers. The only meaningful dyno chart comparison would be on the same dyno with the same machine within a reasonable amount of time. It is true that atmospheric correction factors are put in place to correct for weather changes but remember, even those numbers are usually put in manually from measurements taken by the dyno operator. The Dynojet dynamometer has become a very popular tool. It has become very common, but it is not necessarily the best tool for engine development. We do use a Dynojet for driveability and throttle response testing but our primary dyno is a Schenk "eddy current" type dynamometer. The Schenk is driven positively from the rear sprocket, removing any tire error such as is found on the Dynojet. Also, the Schenk is a "steady state" load absorbtion device that allows us to hold the engine at a specific rpm at full throttle for any amount of time. Often, the power measurement after an engine is stabilized at a given RPM is different from that shown when the engine sweeps through the range as occurs on the Dynojet.


Q: What is the difference between stainless steel and titanium and which is "better"?

A: Stainless steel is the standard material for a Muzzy exhaust system. In most cases a stainless steel system weighs about 12 pounds. The optional material, titanium weighs a little over half as much as steel yet is stronger. The average weight of a titanium system is about 7.5 pounds. For comparison, stock systems can weight from 20 to 35 pounds. Generally the design is the same for both the titanium or stainless steel, so the power output is the same as well. Titanium systems are more expensive because the material is more expensive and the welding involved is a strictly controlled TIG process. Both stainless steel and titanium are better materials than mild steel. Titanium, due to its' light weight could be called a better material than stainless steel.


Q: What are the different muffler options and which is "better"?

A: Muzzys offers mufflers in two styles and four materials. Round mufflers are available only in aluminum. Oval mufflers are available in carbon fiber, titanium and stainless steel. The standard muffler shipped with a stainless steel exhaust system is the round polished, or oval aluminum (side x side exhausts). The standard muffler shipped with the titanium exhaust is the oval shape, either in titanium, carbon fiber or stainless steel. Any sportbike muffler is available with any exhaust by ordering the correct part number for the combination. Oval carbon, oval titanium and oval stainless steel are extra cost items when ordered with a stainless header.

Any oval muffler (including bolt-ons) can be ordered either in carbon fiber or titanium at the same cost. Oval stainless mufflers are generally slightly less. In general the core diameter and length are the same regardless of shape and material. Therefore, performance and sound level is the same regardless of material or shape. Special "quiet" cores are smaller and are available at a slight performance penalty and extra cost. MUZZY Mufflers are packed with a special hi temperature sound absorbing fiber material and should always be repacked with this material. Carbon fiber mufflers are not recommended for extended high temperature operation such as found in dyno testing or extended periods at high power. Care must be taken to ensure that carbon fiber mufflers are kept well packed to avoid heat damage.
Features: The round aluminum muffler is highly polished and incorporates polished stainless steel end caps. The end caps are riveted in place and are easy to re-pack by drilling out and replacing the rivets. The standard aluminum muffler weighs about 3.5 pounds. The oval mufflers incorporate end caps machined from solid billet aluminum and highly polished. The exhaust tip is polished stainless steel. The titanium mufflers features a brushed finish. The end caps are fastened with polished button-head allen screws which are easily removable to facilitate re-packing. The oval titanium muffler weighs 4.6 pounds, the oval carbon 3.5 pounds.


Q: How do I care for the finish on my Muzzy Exhaust?

A: The stainless steel systems have a brushed finish. Over time they will turn yellow and may become stained. The color can be lightened and most stains removed by scrubbing the tubes with a Scotchbrite® pad and WD-40®. The titanium systems will change various colors due to variations in temperature and they can also be cleaned with the Scotchbrite pad. Aluminum mufflers can be polished with any popular aluminum polish such as Simichrome, Blue Magic or Mothers. Carbon mufflers can be cleaned with a plastic polish like Plexus or Meguires. The end caps on the oval mufflers can be polished with aluminum polish.


Q: Are aftermarket exhaust systems street or off-road legal?

A: No. Muzzy exhaust systems are designed for high performance applications and are sold for closed-course racing competition use only.




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